That is normal. I am getting 92 and 92 psi at 5000' and that was right after update was done. Both sides should be the same. Part of it is your elevation, and your tester, and how cold the sled is. Just keep note of what the compression is, then you can use it as a baseline. Now you can check it with the same tester same conditions to see if anything changes.
As far as the flash, I had my flashed back to the 09 map.
I had to talk the mechanic in helping me because he said they are 2 weeks out before they could get me in. Its like a 10 min job so I came first thing when then opened and helped him do it quick. I took the part number for my color of injectors. The part number correlates to the date of the flash. I was there when he hooked up to the laptop so I saw him do it. He clicked on ECU reprogram and it pulled up a full screen of possible selections. Then we just searched for the part number that was given to me to tell him and that is the one we selected. If I remember correctly when you select the part number it listed the date by it. So, I am almost certain they can put any of the flashes back in.
I think that the reason that you are not pulling the rpms that you used to is because you have a low compression head. You lost an estimated 10 hp with the 2010 update. You can get some of this power back by getting a fuel controller that will help lean out the rich top end. and help with the lean mid-range. Most have posted by doing this it will get a few rpms back. If you get a fuel controller they recommend a certain flash with the fuel controller. This is what I would recommend.
